Serving mechanism



H. J. BOE S ERVING MECHANISM Jan. 18 1927. 1,614,594

Filed June 7 1923 2 Sheets-Sheet 1 [i2 venior v I 1,614,594 Jan. 181927. H. J BOE SERVING MECHANISM Filed June 7, 192a 2 Sheets-Sheet 2 155 5 J9 Inventor filmer J. B0

Patented Jan. 18, 1927.

UNITED STATES PATENT OFFICE.

HELMER JOHN BOE, OF CHICAGO, ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COM-IANY, INCORPORATED, or NEW YORK,

. Y., A CORPGEATIQN OF NEW YORK.

' SERVING MECHANISM,

Application filed June '7, 1923.

This invention relates to serving mechanism, but more particularly tomechanism for serving strand on a core.

The covering of a core by serving around it a strand of material isattended by the difi'iculty of keeping the tension necessary to servethe strand on the core below the limit of the tensile strength of thestrand. In the case of paper strand being served upon a central core ofwire by a machine running at high speed prevention of breakage of thestrand becomes an important factor in the operation of the machine.

An object of the present invention is to reduce the tension on it whileserving a strand upon a core.

Another object is to serve a tape from the center of a supply pad oftape.

A further object is to employ strand material having small tensilestrength by main-- taining at a minimum the tension placed on the strandwhile being served on a core.

In order to attain these objects there is provided, in accordance withone embodiment of the invention, a disc mounted upon a sleeve around aspindle and carrying a pad of paper, the tension of the strand beingdrawn therefrom acting to regulate the rate of rotation of the disc andaccompanying pad. speed and the disc is actuated thereby, through afriction clutch, but the method of regulating its rate of rotation bythe tension on a strand will be explained later.

These and other features not specifically mentioned will appear fromthe. following description and the accompanying drawings.

Fig. 1 shows a side elevation of a serving mechanism D Fig. 2 is anenlarged vertical longitudinal section of part of Fig. 1;

Fig. 3 is a front elevation of the disc and the retaining plate forholding the pad in place, and also shows a smoothing d1e mounted upon aholder in a well known manner;

Fig. 4: is an enlarged front view of the central parts of the device; 1

Figs. 5 and 6 show in detail the method of fastening a retaining plateto the disc.

Referring to the drawings in detail, a frame 100 houses a motor (notshown) with a hollow shaft 101 keyed to a sleeve 27, which is integralwith a plate 18. A pulley 33 has a driving connection'with sleeve 27,

carries guide members and 32. ,neled ring 26 1s also integral with plate18 The sleeve rotates at a constant in Fig. 1.

Serial No. 643,933.

and a belt 16 drives a take-up mechanism (not shown) of any suitabletype.

Pins 3 1 are set into recesses 25 in the pulley 33 and are forcedoutwardly by springs 10 against a ball thrust bearing 12. This bearingis loosely mounted upon a bushing 1 1 is also a strand supply holdingmember 20. A. flange 21 integral with this member and resting againstthe ball bearing 12 receives the thrust of the springs 10 through it.This action tends to force the member 20 against a clutch pad 23 whichgives a friction driving connection between the two members while inthis position. A bifurcatedpost 38 is integral with plate 18, an arm 43being free to move longitudinally between the bifurcated arms .of thispost, the pin 28 limiting its longitudinal movement therein. This member43 is integral with tapered member and at its other end carries a guidemember 31 which with other similar guide members mentioned herein may beeither a polished pin or a roller. A post 17 is also integral'with plate18 and A chanand has an opening radially opposite a guide member 86which is directly connected to plate 18. A spring 89 is connected to theplate 18 by means of a screw 56 and is held in contact with the guidemember 86 by a pin 57 which is also integral with plate 18.

As shown in Fig. 2 tapered member 35 may be screwed to hollow rod 15which extends through the hollow shaft of the motor and emerges in therear of the machine as shown The lower end of a lever 1-9 rests againstthe end of this rod and is provided with an opening so as not tointerfere with the free passage of a core 14 therethrough, and thislever is connected by a pivot 46 to a support 51 which is integral withthe motor housing 100. The short end of this lever is pivotallyconnected by a pin 12 to a rod 53-, the length of which'may be adjustedby a turnbuckle 5 1, the other end of the rod being pivotally connectedby a pin 52 to lever 58. This lever is in turn con nected by a pivot 61to a bracket which is integral with the motor housing 100.

The lower part of lever 58 is bifurcated outwardly by a coiled spring74:.

the other side of which is in contact with the flange 21. A stud 83 isintegral with lever 58 and carries a sleeve89 with a friction pad 77thereon, which is forced A pin 40 integral with the stud and riding in aslot d1 in the sleeve limits the movement of the sleeve.

A plate 73 having radially extending project-ions for securing it to themember 20 is provided for holding a strand supply pad 37 in place duringthe operation of the apparatus. The lowest of these projections, betweenwhich the plate 73 is divided on a radius, lit into a pocket made bynotching the member 20 and fastening a plate 24: over this notch bymeans of screws 82. Projections 87 at the sides of plate 73 fit intonotches, out in the member '20, to receive them, and the method ofconnecting the plate at the top is shown in detail in Figs. 5 and 6.

A stud 90 is riveted to the plate 73 as shown and may be insertedthrough an opening 92 in member 20. A slide 9% is set in a depression 96and is held therein by a plate 98 which is fastened to the member byscrews 117. A handle 93 is integral with the slide 94: and a spring wire95, supported between studs 97 and acting on the side of the handletends to force the slide outward into a groove in the stud 90, thussecuring it in place. hen the stud is not in place, the plate 98, actingas a stop for the handle, limits the outward movement of the slide 9%.The plate 78 is perforated as shown for the purpose of allowing theoperator to 7 view the progress of the depletion of the strand supply,the semi-circular notches at the periphery showing definitely when thesupply is about to become exhausted.

A die 48 in a holder 55 smooths the strand after it has been served withthe strand.

The operation of the mechanism is as follows:

A pad or roll 37 of paper strand is placed against the face of member20, the periphery of the pad fitting inside the ridge 22, and plate 73is put in place by slipping the lower projections thereof into thepocket back of plate 24: and pressing the stud 90 into the opening 92with suliicient force for the rounded head of the stud 90 to move backthe slide 92 and allow it to snap back into the groove in the stud andthus lock it in place. An end of the strand is now drawn from the insideof the roll, through the opening in the channeled ring 26, betweenthe-guide member 36, and spring 39, around the guide members 30, 31, and32 in turn, out past the tapered member 35 and, after giving the paper afew turns around the coreto secure it, thereto, through the die 48 whichsmoothes the strand on the core. The spring 39 resting against guidemember 36 holds the strand while the machine is at rest and prevents theunwinding of an excess amount of strand.

The motor is then started which revolves shaft 101 and with it thesleeve 27 carrying the core and this causes some of the strand to pileupon the channeled ring 26 as shown in Figs. 2, 3, and a. The piling up ofthe strand on this channeled ring increases the tensionnecessary to drawthe strand therefrom and this in turn increases the tension on thestrand around the guide members 31), 31, and 32, which draws the guidemember 32, and with it the tapered member 35, rear ward. The arm of themember 43, riding in the slot in the post 38, is for the purpose ofcausing member 43 to rotate with the plate 18.

As the tapered member moves rearward it carries the rod 45 with it, andthe other end of rod a5 moves the lower end of the lever 49 to theright. This moves the rod 53 to the left and causes the upper end of thelever 58 to move to the left also. The friction brake pad '77 is by thisaction pressed against the rear surface of the disc 20, while at thesame time the lower forked end of the lever, pressing the collarrearward. exerts a pressure on flange 21 through the ball thrust bearing12. which tends to carry the disc 20 to the right and out of contactwith the friction pad 23, thereby removing the driving force therefrom.This combined drive release and braking action tends to retard therotation of disc 20 so that it rotates more slowly than the channeledring. Thus some of the paper on the channeled ring is unwound therefromtoward the pad itself. When the tension on the strand has decreased to apoint where itis insufficient to retain the tapered member in itsrearward position, the springs 10 force the disc once more into contactwith the friction drive pad 23 which resumes the driving action, whilethe brake 77 is retracted at the same time from the rear surface ofmember 20.

This alternate driving and retarding action continues during theoperation of the apparatus, balancing itself as it were to maintainproper tension on the strand at all times.

The tension on the strand with this device is very low and breakagethereof is practicall eliminated during operation.

VVhat is claimed is:

1. In a machine for serving a strand on a liIO core, means for holding asupply of strand, driving means therefor, means for serving the strandfrom the interior of the supply at a constant speed, and meanscontrolled by the strand for regulating the amount of power communicatedto the holding means.

2. In a machine for serving a strand on a core, means for holding asupply of strand, means for serving the strand from interior of thesupply, means for driving the holding and serving means, and meanscontrolled by the strand to regulate the amount of power communicated tothe holding and serving means.

3. In a machine for serving a strand on a core, a rotatable member forholding a supply of strand, rotatable means to draw the strand from theinterior of the supply and to serve it upon a core, and means controlledby the withdrawn strand for regulating the amount of power communicatedto said rotatable supply member and the serving means.

4. In a machine for serving a tape, rotatable serving means, a rotatablesupply pad holder, feeding means to draw the tape from the interior ofthe pad, means for actuating the holder and the feeding means, and meanscontrolled by the tape for regulating the relative speed of the servingmeans and the supply pad holder.

5. In a machine for serving strand on a core, a rotatable strand supplyholder, a rotatable spindle centrally mounted thereof and having africtional driving connection therewith, driving means to actuate saidspindle, and clutch releasing and braking means regulated by the tensionon the strand to govern the relative speed of the spindle and the supplyholder.

6. In a machine for serving a strand on a core, means for holding asupply of strand, means for servin the strand from the interior of thesupp means for rotating the holding and serving means, means for storingsurplus unserved strand withdrawn from the supply, and means controlledby the accumulation therein of a predetermined amount of strand forvarying the speed of rotation of the holding means.

7. In a machine for serving a strand on a core, means for holding asupply of strand, means for serving the strand from the interior of thesupply at a constant speed, means controlled by the serving means fordriving the holding means, means for storing the unserved strandwithdrawn from the supply, and means controlled by the storage of apredetermined amount of unserved strand to vary the effectiveness of themeans for driving the holding means.

8. In a machine for serving a strand on a core, means for holding asupply of strand, means for serving the strand from the interior of thesupply, means for rotating the holding and serving means, means forstoring unserved strand withdrawn from the supply, and means controlledby the accumu lation therein of a predetermined amount of strand tounwind therefrom a portion of the stored strand. 1

9. In a machine for serving a strand on a core, means for holding asupply of strand, means for serving the strand from the supply, meansfor rotating the holding and serving means, means for storing surplusunserved strand withdrawn from the supply, and means controlled by theaccumulation therein of a predetern'iined amount of strand for varyingthe relative speed ofthe holding and serving means.

10. Ina machine for serving a strand on a core, means for holding asupply of strand, means for serving the strand from the interior of thesupply, means for rotating the holding and serving means, means forstoring surplus unserved strand withdrawn from the supply, and meanscontrolled by the accumulation therein of a predetermined amount ofstrand for varying the relative speed of the holding and serving means.

In witness whereof, I hereunto subscribe my hand this twenty-sixth dayof May A. D.,1923.

HELMER JOHN 130E.

